The completion of the £745m project has been disrupted by the insolvency of Carillion.

The £745m Aberdeen Western Peripheral Route project will not be completed until the summer, according to a contractor.

Balfour Beatty released a statement saying its contract is not going to be completed by the Scottish Government's deadline of spring.

The project on the 28-mile route is one of the biggest infrastructure projects in Scotland.

Scottish Liberal Democrat transport spokesperson Mike Rumbles MSP said: "After months of SNP waffle, Balfour Beatty has finally revealed what we all suspected: this project is not going to be finished when the government said it would.

"These delays will impact on thousands of commuters and local people eagerly waiting on the road's opening."

In response to the announcement, a Scottish Government spokesman said: "The Scottish Government continues to have discussions with Aberdeen Roads Limited in order to achieve an agreed date for the earliest possible completion of this project, despite the recent insolvency of Carillion.

"We expect these to conclude shortly and will provide a full update to parliament at that time."

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